Abstract
The use of Cyclophosphamide, an anti-cancer and immunosuppressant drug, is accompanied by a number of side effects. Rats injected with a single dose of cyclophosphamide (200 mg kg −1 body weight) showed an increase in the levels of serum glutamate-oxaloacetate transaminase, serum glutamate-pyruvate transaminase, glucose-6-phosphate dehydrogenase and creatine phosphokinase isoenzyme by 53, 24, 55 and 135%, respectively. Also the ability of heart or liver mitochondria to retain accumulated Ca 2+ and tetraphenylphosphonium ion was sharply affected in treated rats. Rats injected with the same dose of cyclophosphamide plus cyclosporin A (500 μg kg −1 body weight) showed reduction in the levels of those enzymes by about 44, 21, 43 and 57%, respectively compared to cyclophosphamide-treated rats. Cyclosporin A treatment also restored mitochondrial ability to retain accumulated Ca 2+ and tetraphenyl phosphonium ions nearly to the level of untreated rats. We suggest that cyclophosphamide induced cardio and hepatotoxicity by increasing heart and liver inner mitochondrial membrane permeability to Ca 2+. The protective effect of cyclosporin A against cyclophosphamide-induced damage also support this suggestion.
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